517903980 has 192 divisors, whose sum is σ = 1730211840. Its totient is φ = 114278400.

The previous prime is 517903943. The next prime is 517903993. The reversal of 517903980 is 89309715.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 347076 + ... + 348564.

It is an arithmetic number, because the mean of its divisors is an integer number (9011520).

Almost surely, 2^517903980 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 517903980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (865105920).

517903980 is an abundant number, since it is smaller than the sum of its proper divisors (1212307860).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

517903980 is a wasteful number, since it uses less digits than its factorization.

517903980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1560 (or 1558 counting only the distinct ones).

The product of its (nonzero) digits is 68040, while the sum is 42.

The square root of 517903980 is about 22757.5038174225. The cubic root of 517903980 is about 803.0632452731.

The spelling of 517903980 in words is "five hundred seventeen million, nine hundred three thousand, nine hundred eighty".